Magnifying apparatus



i r 24 19 31. KONIECZNY 1,793,623

MAGNIFYING APPARATUS Filed July 5, 1928 2 Sheets-Sheet l mm nm 7 HI 1 1*F833. 24, 1931. KQNiECZNY 793,623

MAGNIFYING APPARATUS Filed July 5. 1928 2 Sheets-Sheet 2 Patented Feb.24, 1931 UNITED STATES ANTON IOHIEOZNY, OI vnnnu, Am

IAGHIIYIHG manna a uuaonmea m 5, 192a, Serial Io.

This invention relates to improvements in enlarging cameras providedwith an auto.

matic focusing device. The known enlarging cameras with automaticfocusing device are constructed in such a manner, that they form aninseparable unit with the projection surface. However cameras of thiskind possess the drawback, that they are very bulky and heavy in weightand further take up a great deal of space. According to the presentinvention an enlarging camera is rovided in which the automatic focusingof t e objective carrier is effected by a lever controlled by a guidecurve and comprises in combination a member hinged to the camera supportfor determining the distance of the latter from a projection surfacewhich is se arate from the camera and a double-arme control lever whichcooperates at one end with the guide curve and at the other end with themovable part of the objective carrier.

The drawings show two embodiments of the invention.

Fig. 1 shows the mechanism in side elevation, Fig. 2 in plan view. Fig.3 shows the device in side elevation, partially in section, Fig. 4 showsthe mechanism in front, out along w-b of Fig. 3. Figs. 5 and 6 areshowing modifications of some details and Fig. 7 shows anotherembodiment of the invention.

"With 1 there is marked the support of a hoto a bio enlar 'n ap aratus2, which it lead e din a rail 3. A% thig rail 3 a distancing-ledge 5 ispivotally mounted by means of a hinge 4, and this ledge 5 determines thedistance from the projecting screen. The rail 3 supports besides this asteering-rail 7, whereon there'glides a roll 8, which is pivotallymounted in the bifurcated stearing member 9. The steering member 9 isfixed at its other end next 12 by screws with the leading-rods 10, 11,and shows a slit 13, wherein there is situated a bolt 14, fixed in thesupport 1. The rods 10, 11 are fixed to the objective carrier 15, andthey are leaded at 16 in the support.

In order to vary the size of the projected picture insuitable manner,the distance between apparatus and receiving screen is al-.

tered. Then follows the focusing in respect is leaded the roll 8. AsFig. 6 shows, the

20am, and m Germany Jul 7,1927.

of sharpness of the picture by suitable displacement of the bellows.

In the" apparatus conforming to the application these two functions areunited, as here the sharpness of the picture is automatically focused bymeans of the displacement of the apparatus. This focusing is derivatedfrom a steering-rail 7, corresponding to the optical fittings of theapparatus.

If the apparatus is drawn forward by using its hand-grasp 20 forinstance along a way :0, then 8 rolls along the steer -rail 7, removingitself thereby as far as a om 0:. The bellows is altered hereby as faras s, the distance 8' being transmitted by the steering member 9. Thecentre 14 of the motion of 9 glides hereby inthe slit 13,'and in thismanner the elevation corresponding to the second partial-way r of m cantake place.

If the apparatus is drawn back; the steering member 9 is forced towander along the steering-rail 7, and thus a lifting-off is avoided,both effects secured by the spiral-springs 21, 22 which are fixed at oneand next m at the camera casing, and at their other ends next n at thedisplaceable part.

A variety with constraint leading is shown in Fig. 5. Thesteering-member is provided here with a steering-slit 23, wherein thereends 24, 25 of the bifurcated steeringmemher are formed here like flapsunder grasping thesteering-rail 7.

It may be mentioned still, that the usage of a concave steering-curve,and of a straightline transmittin -1ever offers an essential advantageopposite to the already known convex steering-curves actuating anangular lever, this advantage consisting in the pos-' sibility to makethe steerin -curve as long as. the guidance provided or the camera.-Therefore a much more precise focusing can be reached, than if convexlycrooked steeringcurves are used, the latter being much shorter andactuating with angular levers the displaceable mechanism.

According to Fig. 7 there is constructed an inflexible rail 5, insteadof the flexible rail 5, this inflexible rail 5 being fixed at thereceiving-screen 6 by means of screws. The 1 rest of the construction,especially the focusing-mechanism is in total accordance with theembodimentaccording to Figs. 1-4. a

I claim:

1. Photographic enlarging apparatus with; a camera support slidablymounted on a guide rail, comprising in combination a steering rail,fixed on the guide rail, a double armed control lever, mounted pivotallyand slidably on the said camera support and engaging at one end thesteering rall, and connected at the other end with rods fixed to theobjective carrier and slidably mounted in bearings of the camera suport.

2. Photographic en ar ing apparatus with a camera support slida 1ymounted on a guide rail, comprising in combination a steering rail,fixed on the guide rail, a double armed control lever, mounted pivotallyand slidably on the said camera support and'engaging at one end thesteering rail, and connected at the other end with rods fixed to theobjective carrier and slidably mounted in bearings of the camerasupport, a slit in the middle part of the lever and a bolt fixed in thecamera support and engaging the slit of the lever.

3. Photographic enlarging apparatus with a camera support slidablymounted on a guide rail, comprising in combination a member hinged tothe camera support for determining the distance of the latter from theprojection surface which is separate from the camera, a steering rail,fixed on the guide b rail, a double armed control lever, mountedpivotally and slidably on the said camera support and engaging at oneend the steering rail, and connected at the other end with rods fixed tothe objective carrier and slidably mounted in bearings of the camerasupport.

In testimony whereof I affix m signature.

ANTON KON EOZNY.

